Counterbalanced pumps and method of using same

Details Counterbalanced pumps and method of using same Counterbalanced pumps and method of using same

F - Mech Eng,Light,Heat,Weapons

04

B

103/144

F04B 9/02 (2006.01) F04B 47/14 (2006.01)

Patent

CA 1188565

ABSTRACT OF THE DISCLOSURE An oscillatory pumping system of the type having sheave chains wound in opposing directions over a mandrel, one sheave chain connecting to a rod string of a well and another supporting a counterbalance, is improved to include both rate and position sensors which, through a logic system, control the application and reversal of power. The system is further improved by selection of geometry and in engagement features such that upon full playout of either chain the time of stroke reversal is shortened.

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